Improvement in heating-stoves



T. WHITE.

HEATING-STOVE.

Patented 0ct.10. 1876.

JAMES R OSGOOD 8: CO BOSTON LTN TED STATES PATENT OFFIo.

; THOMAS WHITE, 0F QUINCY, ILLINOIS.

'IMPROVEMENT m HEATING-STOVES.

Specification forming part of Letters Patent No. 183,033, dated October10, 1876; application filed a June29, 1875.

To all whom it may concern:

Be it known that I, THOMAS WHITE, of Quincy, in the countyof Adams andState of Illinois, have invented an Improvement in MagazineHeating-Stoves, of which the following is a specification:

The object of my invention is to supply a volume of air to thecombustion chamber through the double wall of the magazine at or nearthe temperature of the gases of combustion and it consists in thecombination of the direct and revertible fines, and anair-pipe arrangedwithin the exterior flue, with its lower end near the floor and itsupper end connecting with the upper end of the air-space; and, further,in the peculiar damper at the upper end of the said air-pipe, all asmore fully hereinafter explained.

Figure 1 is a vertical section of a revertibledraft base burning stovefitted with my improvement. Fig. 2 is a horizontal section at m as,showing the hot-blast register-slide.

In the drawing, A represents the ash-pit, B the fire-pot, O thecombustion-chamber, and D the magazine-section, of an ordinary magazinestove, in which the magazine E is suspended from the top, access towhich is had by removing the cover a. F is a casing suspended from anannular flange, b, in the upper part of the magazine-section. Itincloses the magazine proper and terminates just below its lower end ina row of inwardly-curved fingers, c, the arrangement of the magazine andits casing being such that an annular cur rect-draft flue, as shown.

I disclaim the invention of a stove constructed as above described, asalso the invention of a double-walled magazine, or of the casing whichincloses it, except the arrangement or combination of theinwardly-curved fingers at the lower end, extending below the mouth ofthe magazine proper, which I believe to be new and original with me. Thedescription of the old parts are introduced merely for the purpose ofillustrating the nature and application of my invention.

Into the lower end of the back line I entera tube, I, whose lower end isflaring and extends nearly to the floor. This tube may extend upward inthe back-flue to a point above the plane of the direct-draft flue, asindicated by the dotted line, or, as shown, it may be simply anair-inlet to the lower end of the back flue. In either case it iscontinued from a point j ust above the flue G upward to a point abovethe flange b, thence horizontally into the annular chamber surroundingthe magazine proper. At the inner end of the air-pipe there is a damper,f, which can be used to regulate or shut off the influx of air.

The draft of the stove causes a column of cold air and the heavier gasesin the apartment to be drawn up through the tubes I into the top chamberof the stove, thence down between the magazine and its casing, anddischarged in highly-heated jets from the lower end of the latter,mingling with the gases of combustion at such an elevated temperature aswill retard their passage, and promote and secure their immediate andperfect combustion.

If cold air were taken directly into the space between the magazine andits casing, as has heretofore been done, it would not be raisedsufficiently in temperature before min glingwith the gases to allow themto ignite, but would lower the temperature of the Whole volume of mixedair and gases, and retard the ignition until again raised to the propertemperature, if an opportunity were afforded, before finding an exitfrom the combustion-chamber hence the necessity of heating the influentaircurrent before it enters the magazine-casing, which is effected inthe manner described, the air-tube in the back flue beingeithercontinuous or interrupted, as shown. In the latter case the cold airdrawn in mingles directly with the gaseous products of combustion thatascend the back flue, and is raised in temperature before an equivalentvolume is withdrawn at the top of the back flue to supply the downwarddraft in the magazine-casing.

The coal cannot lodge orchoke at the mouth of the magazine by reason ofits swelling in the process of coking, as the influent currents at thatpoint secure its combustion, after which it settles down into the firepot, and thus allows the fuel to feed the fire as required.

What I claim as my invention is- 1. In a heating-stove, with an incasedmagazine, and an exterior flue adapted for direct and for revertibledraft, and in combination with the direct and revertible flues, theair-pipe 1, arranged within the exterior flue, with its lower end nearthe floor and its upper end connecting with the upper end of theairspace between the double walls of the magashown.

THOMAS WHITE.

Witnesses:

ALFRED VANCE, D. MOAFEE.

